Page 38 - SONO 260 The Fetal Head and Brain
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Cerebral Malformations Holoprosencephaly
¢Alobar holoprosencephaly is diagnosed when there is absence of the corpus callosum, cavum septum pellucidum, third ventricle, interhemispheric fissure, and falx cerebri.
There will also be evidence of a horseshoe-shaped monoventricle and the lobes of the thalamus will be fused and echogenic in appearance.
Conversely, the cerebellum and brainstem remain intact.
